CN1692655A - Image display device, image display method, and computer-readable recording medium containing image display program - Google Patents

Abstract

In an image display device, an image processing section (21) converts image signals of a plurality of basic colors into color information including lightness and saturation. When correcting the saturation (brightness) of the color information, the correction method is changed according to the light modulation state of a display device. When modulating the light, correction is performed to lower the saturation and when performing no light modulation, correction is performed to raise the saturation.

Description

The recording medium of the embodied on computer readable of image display device, method for displaying image and document image display routine

Technical field

The present invention relates to the recording medium of the embodied on computer readable of image display device, method for displaying image and document image display routine.

Background technology

In recent years, along with the IT development of technology, more and more higher to the demand of image display device in every field.In this class image display device, can utilize the orientation of electrical method control liquid crystal molecule, make the liquid crystal indicator of its changes in optical properties, because its low power consumption, slimming is characteristics such as soft to eyes, causes people's expectation especially.In addition, in recent years, as a kind of mode of liquid crystal indicator, image (image) that will outgoing from the optical system of using liquid crystal light valve amplifies the projection-type liquid crystal display device (liquid crystal projector) that projects on the screen by projection lens, obtains to use widely.

This projection-type liquid crystal display device as light-modulating cell, uses light valve, but because the light that is produced by the various opticses that constitute optical system leaks and stray light, and the brightness range that can show (dynamic range) is narrow, is difficult to improve the quality of image sometimes.Therefore, as the method that enlarges dynamic range, in the prior art, someone has proposed according to signal of video signal the light quantity that incides on the light valve (light-modulating cell) to be changed, on the other hand, representative is presented at the data expansion of the brightness of the image on the light valve, so that strengthen the method for the contrast of image.But the problem that when the image spreading that will be presented on the light valve, the color (vividness) that image projected can take place changes, the ratio (balance) of R (red), the G (green) of projects images, B (indigo plant) is destroyed.

Summary of the invention

The present invention In view of the foregoing implements, its objective is, provide a kind of according to picture signal as the display image of the content of image, the ratio of the picture signal of a plurality of Essential colour is changed, can change the image display device of the dynamic range (brightness range that can show) of display image, the recording medium of the embodied on computer readable of method for displaying image and document image display routine.

First kind of mode of the present invention, be by making light quantity change the image display device of the adjustment of carrying out display image, comprise: spreading coefficient according to the rules is with the expanding element of the picture signal expansion of a plurality of Essential colour of display image, to utilize above-mentioned expanding element image expanding signal transformation to become to comprise the image signal transformation unit of the colour information of colourity and brightness (luminosity), carry out the amending unit of correction of the colourity of above-mentioned colour information, and the colour information that will comprise the colourity of utilizing above-mentioned amending unit correction is transformed into the chrominance signal converter unit of the picture signal of a plurality of Essential colour.

In addition, be by making light quantity change the method for displaying image of the adjustment of carrying out display image, comprise: the first step of the picture signal of a plurality of Essential colour of spreading coefficient expansion display image according to the rules, to utilize above-mentioned first step image expanding signal transformation to become to comprise second step of the colour information of colourity and brightness, carry out the third step of the colourity correction of above-mentioned colour information, and the colour information that will comprise the colourity of utilizing above-mentioned third step correction is transformed into the 4th step of the picture signal of a plurality of Essential colour.

In addition, the second way of the present invention, be by making light quantity change the image display device of the adjustment of carrying out display image, comprise: the image signal transformation unit that the image signal transformation of a plurality of Essential colour of display image is become to comprise the colour information of colourity and brightness, carry out the amending unit of the colourity correction of above-mentioned colour information, spreading coefficient expansion according to the rules utilizes the expanding element of the brightness of the colour information after the unit conversion of above-mentioned image signal transformation, and the colour information that will comprise the colourity of the brightness that utilizes the expansion of above-mentioned expanding element and above-mentioned correction is transformed into the colour information converter unit of the picture signal of a plurality of Essential colour.

In addition, be by making light quantity change the method for displaying image of the adjustment of carrying out display image, comprise: the first step that the image signal transformation of a plurality of Essential colour of display image is become to comprise the colour information of colourity and brightness, carry out second step of the colourity correction of above-mentioned colour information, spreading coefficient expansion according to the rules utilizes the third step of the brightness of the colour information after the above-mentioned first step conversion, and the colour information that will comprise the colourity of the brightness that utilizes the expansion of above-mentioned third step and above-mentioned correction is transformed into the 4th step of the picture signal of a plurality of Essential colour.

In the present invention, utilize of the conversion of above-mentioned image signal transformation unit, for example, can list to the conversion in HSV space with to the conversion in Yuv space to the color space of picture signal.

Amending unit in that image signal transformation is arrived under the situation in HSV space, is revised the S signal as the signal of the vividness of representing color.In addition, amending unit arrives image signal transformation under the situation in Yuv space, revises u signal and v signal as the signal of expression color.

The image display device of first kind of mode and method for displaying image, because the image signal transformation of a plurality of Essential colour that will expand becomes to comprise the colour information of colourity and brightness, after colourity revised, the colour information inversion is changed into the picture signal of a plurality of Essential colour, so, the dynamic range of change display image under the prerequisite that can change in the ratio of the picture signal that does not make a plurality of Essential colour.

The image display device of the second way and method for displaying image, because in the colour information that the image signal transformation of a plurality of Essential colour is become to comprise colourity and brightness, and in the expansion of carrying out brightness with after to the correction of colourity the colour information inversion is changed into the picture signal of a plurality of Essential colour, so, the dynamic range of change display image under the prerequisite that can change in the ratio of the picture signal that does not make a plurality of Essential colour.

And then, in first and second kinds of modes, utilizing the image signal transformation unit in the conversion in HSV space, it is very simple that corrected Calculation becomes, and can make the processing high speed.In addition, utilizing the image signal transformation unit in the conversion in Yuv space,,, can make the entire process speed high speed of correcting process so conversion process is fast because formula according to the rules carries out the conversion process to the Yuv space.

The third mode of the present invention, be by making light quantity change the image display device of the adjustment of carrying out display image, comprise: compensation (the オ Off セ ッ ト) processing unit that the picture signal of a plurality of Essential colour of display image is compensated processing according to offset, spreading coefficient according to the rules will utilize above-mentioned compensation deals unit to compensate the expanding element that the picture signal after the processing is expanded, to carry out the image signal transformation unit that image expanding signal transformation becomes to comprise the colour information of colourity and brightness with above-mentioned expanding element, carry out the amending unit of correction of the colourity of above-mentioned colour information, will comprise the colour information converter unit that is transformed into the picture signal of a plurality of Essential colour with the colour information of the corrected colourity of above-mentioned amending unit.

In addition, be by making light quantity change the method for displaying image of the adjustment of carrying out display image, comprise: the first step that the picture signal of a plurality of Essential colour of display image is compensated the compensation deals of processing according to offset, spreading coefficient according to the rules will compensate second step that the picture signal after the processing is expanded with above-mentioned first step, to carry out the third step that image expanding signal transformation becomes to comprise the colour information of colourity and brightness with above-mentioned second step, carry out the 4th step of correction of the colourity of above-mentioned colour information, and, will comprise the 5th step that is transformed into the picture signal of a plurality of Essential colour with the colour information of the corrected colourity of above-mentioned the 4th step.

The 4th kind of mode of the present invention, be by making light quantity change the image display device of the adjustment of carrying out display image, comprise: the image signal transformation unit that the image signal transformation of a plurality of Essential colour of display image is become to comprise the colour information of colourity and brightness, carry out the amending unit of correction of the colourity of above-mentioned colour information, the brightness with the colour information after the unit conversion of above-mentioned image signal transformation is compensated the compensation deals unit of processing according to offset, the expanding element that the brightness of the colour information after spreading coefficient according to the rules will carry out overcompensation and handle with above-mentioned compensation deals unit is expanded will comprise brightness of expanding with above-mentioned expanding element and the colour information converter unit that is transformed into the picture signal of a plurality of Essential colour with the colour information of the corrected colourity of above-mentioned amending unit.

In addition, be by making light quantity change the method for displaying image of the adjustment of carrying out display image, comprise: the picture signal first step that the image signal transformation of a plurality of Essential colour of display image is become to comprise the colour information of colourity and brightness, carry out second step of correction of the colourity of above-mentioned colour information, the brightness by the colour information after the above-mentioned first step conversion is compensated the third step of processing according to offset, the 4th step that the brightness of the colour information after coefficient according to the rules will be carried out overcompensation and be handled by above-mentioned third step is expanded, and, will comprise brightness of expanding by above-mentioned the 4th step and the 5th step that is transformed into the picture signal of a plurality of Essential colour by the colour information of the corrected colourity of above-mentioned second step.

The 3rd and the image display device and the method for displaying image of the 4th kind of mode, compensate processing by above-mentioned compensation deals unit according to offset, the vividness of picture signal is changed.

Here, for offset, use in the view data the roughly value of the darkest part.In addition, so-called compensation deals are meant by to the adding deduct of the picture signal value of compensating, and make the processing that the vividness of picture signal can not change.

The 3rd and the image display device and the method for displaying image of the 4th kind of mode, because the brightness to the colour information after being transformed into the picture signal before the color space or being transformed into the color space compensates processing, the part of the distinctness of picture signal becomes more remarkable, therefore can further bring into play the effect of colourity correction.

The 5th kind of mode of the present invention, be by making light quantity change the image display device of the adjustment of carrying out display image, comprise computing formula according to the rules, each of the picture signal of a plurality of Essential colour of display image is carried out the amending unit of correction of the colourity of picture signal.

In addition, be the method for displaying image carry out the adjustment of display image by light quantity is changed, computing formula is according to the rules carried out the correction of the colourity of picture signal to each of the picture signal of a plurality of Essential colour of display image.

The image display device and the method for displaying image of the 5th kind of mode, because computing formula is according to the rules carried out the colourity correction by direct calculating, so, can omit and transform to the color space, from the inverse transformation equal time of the color space to picture signal, can make the correcting process high speed.

The 6th kind of mode of the present invention, be by making light quantity change the image display device of the adjustment of carrying out display image, comprise: map table according to the rules is to each converter unit of expanding of the picture signal of a plurality of Essential colour of display image, and the amending unit to revising with the colourity of the versicolor picture signal of above-mentioned converter unit conversion.

In addition, be by making light quantity change the method for displaying image of the adjustment of carrying out display image, comprise: map table is according to the rules expanded each of the picture signal of a plurality of Essential colour of display image or the first step of compensation deals, and second step to revising with the colourity of the versicolor picture signal of above-mentioned first step conversion.

The image display device and the method for displaying image of the 6th kind of mode by utilizing map table, can carry out complicated extension process, performance width that can the expanded view picture.

Image display device of the present invention may further include and detects the detecting unit that leaks light quantity, and above-mentioned amending unit is revised according to above-mentioned leakage light quantity.

In addition, the so-called light quantity of leaking is meant in light valve display setting to be got the light quantity that shows when the darkest.

According to this structure, because amending unit will leak light quantity also as the consideration object when revising, so, can carry out more accurate colourity correction.

In addition, also can adopt a kind of like this structure, promptly, above-mentioned expanding element, spreading coefficient is according to the rules expanded, and comprising that further one is predicted the predicting unit of above-mentioned colourity according to one of them and the above-mentioned leakage light quantity at least of above-mentioned offset, above-mentioned spreading coefficient, above-mentioned amending unit is according to revising with the colourity of above-mentioned predicting unit prediction.

According to this structure, owing to amending unit is revised according to the colourity of being predicted by predicting unit, so, can carry out more accurate colourity correction.

In addition, also can adopt a kind of like this structure, it further comprises a selection by the selected cell one of in a plurality of colourities of above-mentioned predicting unit prediction, and above-mentioned amending unit is according to revising with the colourity of above-mentioned selected cell selection.

According to this structure, owing to can utilize selected cell to select the modification method that is undertaken by amending unit, so, can meet the correction of user's specification requirement.

A plurality of colourities for predicting unit prediction for example, can list the colourity according to the image expanding signal estimation, according to the colourity of image expanding signal estimation not etc.

For the correction that utilizes amending unit to carry out, correction that improves vividness and the correction that reduces vividness are arranged.The so-called correction that improves vividness is meant the correction that is complementary with colourity according to the image expanding signal estimation, and in addition, the so-called correction that reduces vividness is meant and the correction that is complementary according to the colourity of image expanding signal estimation not.

The 7th kind of mode of the present invention, the recording medium of the embodied on computer readable of the image display program of the adjustment that is record by light quantity being changed carry out display image, make computer carry out following function: the expanded function of the picture signal of a plurality of Essential colour of spreading coefficient expansion display image according to the rules, to utilize above-mentioned expanded function image expanding signal transformation to become to comprise the image signal transformation function of the colour information of colourity and brightness, carry out the debugging functions of the colourity correction of above-mentioned colour information, and, will comprise the colour information mapping function that the colour information of carrying out the colourity revised with above-mentioned debugging functions is transformed into the picture signal of a plurality of Essential colour.

The 8th kind of mode of the present invention, the recording medium of the embodied on computer readable of the image display program of the adjustment that is record by light quantity being changed carry out display image, make computer carry out following function: the image signal transformation function that the image signal transformation of a plurality of Essential colour of display image is become to comprise the colour information of colourity and brightness, carry out the debugging functions of correction of the colourity of above-mentioned colour information, coefficient will be with the expanded function of the brightness of the colour information behind above-mentioned image signal transformation functional mapping expansion according to the rules, and, will comprise with the brightness of above-mentioned expanded function expansion and be transformed into the colour information mapping function of the picture signal of a plurality of Essential colour with the colour information of the colourity of above-mentioned correction.

The 9th kind of mode of the present invention, the recording medium of the embodied on computer readable of the image display program of the adjustment that is record by light quantity being changed carry out display image, make computer carry out following function: the compensation deals function that the picture signal of a plurality of Essential colour of display image is compensated processing according to offset, spreading coefficient according to the rules will utilize above-mentioned compensation deals function to compensate the expanded function that the picture signal after the processing is expanded, to utilize above-mentioned expanded function image expanding signal transformation to become to comprise the image signal transformation function of the colour information of colourity and brightness, and, carry out the debugging functions of correction of the colourity of above-mentioned colour information, will comprise the colour information mapping function that the colour information of utilizing the corrected colourity of above-mentioned debugging functions is transformed into the picture signal of a plurality of Essential colour.

Description of drawings

Fig. 1 is the simple structure chart of an example of expression projection type image display apparatus.

Fig. 2 is the block diagram of structure of drive circuit of the projection type image display apparatus of first kind of execution mode of expression.

Fig. 3 is the block diagram that the image processing bilge construction under the situation of HSV space is arrived image signal transformation in expression.

Fig. 4 is the figure of expression HSV color space (color space).

Fig. 5 is the block diagram of variation of the image processing part of presentation graphs 3.

Fig. 6 is the block diagram that the structure of the image processing part under the situation of Yuv space is arrived image signal transformation in expression.

Fig. 7 is the block diagram of variation of the image processing part of presentation graphs 6.

Fig. 8 is the block diagram of structure of drive circuit of the projection type image display apparatus of second kind of execution mode of expression.

Fig. 9 is the block diagram of expression with the structure of the image processing part of the second kind execution mode of image signal transformation under the situation of HSV space.

Figure 10 is the block diagram of variation of the image processing part of presentation graphs 9.

Figure 11 is the block diagram of expression with the structure of the image processing part of the second kind execution mode of image signal transformation under the situation of Yuv space.

Figure 12 is the block diagram of variation of the image processing part of Figure 11.

Figure 13 is the block diagram of structure of the image processing part of the third execution mode of expression.

Figure 14 is the block diagram of structure of drive circuit of the projection type image display apparatus of the 4th kind of execution mode of expression.

Figure 15 is the figure of an example of expression map table.

Figure 16 is the block diagram of structure that is illustrated in the image processing part of the 4th kind of execution mode under the situation of utilizing map table.

Figure 17 is the block diagram of structure that transforms to the image processing part of the 4th kind of execution mode under the situation in HSV space.

Figure 18 is the block diagram of variation of the image processing part of expression Figure 17.

Figure 19 is the block diagram of the structure of the drive circuit under the picture signal situation of expression behind the input coding.

Figure 20 is the diagram of variation of the drive circuit of expression Figure 19.

Embodiment

Below, describe the recording medium of the embodied on computer readable of image display device of the present invention, method for displaying image and document image display routine in detail referring to figs. 1 through Figure 20.

As an example of the image display device that utilizes method for displaying image of the present invention, use the display unit of porjection type that has a three-plate type of liquid crystal light valve for each different color of RGB to describe.

Fig. 1 is the simple structure chart of an example of expression projection type image display apparatus.

As shown in Figure 1, projection type image display apparatus comprises: light source 510, Light modulating device 26, dichronic mirror 513,514, speculum 515,516,517, relay lens 518,519,520, red light liquid crystal light valve 522, green light liquid crystal light valve 523, blue light liquid crystal light valve 524, cross colour splitting prism 525, projection lens system 526.

Light modulating device 26 for example, is to be made of the variable liquid crystal panel of transmissivity.

Light source 510 is made of the reflection of light mirror 512 of lamps such as extra-high-pressure mercury vapour lamp 511 and reflector lamp 511.Between this light source 510 and dichronic mirror 513, configuration adjustment is from the Light modulating device 26 of the light quantity of light source 510.

The dichronic mirror 513 of reflect blue light green light sees through the red light from the white light of light source 510, simultaneously, and reflect blue light and green light.The red light that sees through mirror 517 reflection that is reflected is incided red light with in the liquid crystal light valve 522.

On the other hand, the green light by dichronic mirror 513 reflects with dichronic mirror 514 reflections, is incided green light with in the liquid crystal light valve 523 by the green light reflection.

In addition, the blue light by dichronic mirror 513 reflects also sees through dichronic mirror 514, through the relay system 521 that is made of relay lens 518, speculum 515, relay lens 519, speculum 516, relay lens 520, incides blue light with on the liquid crystal light valve 524.

Light by 3 kinds of colors of each liquid crystal light valve 522,523,524 modulation incides on the cross colour splitting prism 525.This prism is that four right-angle prisms are pasted together, and on the surface, forms the dielectric multilayer film of criss-cross reflection red light and the dielectric multilayer film of reflect blue light within it.Light by synthetic three colors of these dielectric multilayer films forms a light of representing coloured image.Synthetic light is projected on the screen 527 by the projection lens system 526 as projection optics system, enlargedly display image.

On each liquid crystal light valve 522,523,524, be connected with the image processing part (in Fig. 1, omitting) of the image processing of each coloured light being stipulated according to picture signal.The picture signal of the image processing of stipulating at image processing part is supplied to each liquid crystal light valve 522,523,524 via the light valve driver.Projection type image display apparatus of the present invention according to the image processing of the regulation of carrying out at this image processing part, carries out image and shows.

Here, the method for displaying image to four kinds of execution modes of first kind of execution mode to the of the projection type image display apparatus of relevant present embodiment describes.

Fig. 2 is the block diagram of structure of drive circuit of the projection type image display apparatus of first kind of execution mode of expression.

At first, picture signal is input to image processing part 21 and graphical analysis portion 24.In graphical analysis portion 24, carry out the analysis of picture signal, calculate spreading coefficient, offer image processing part 21 as the image control signal.

In addition, graphical analysis portion 24 is according to dimming control signal control Light modulating device driver 25.Dimming driver 25 control Light modulating devices 26.This Light modulating device driver 25 has or not expansion according to the picture signal that is offered each liquid crystal light valve 522,523,524 by image processing part 21, makes the illumination light quantitative changeization from light source 510.Thus, in the brightness range of expansion display image, can realize along sliding gray scale performance.In the projection type image display apparatus of present embodiment, by above-mentioned effect, can enlarge dynamic range, improve the quality of image.

Light modulating device driver 25 for example, is under the situation about being expanded in the picture signal that offers each liquid crystal driver 522,523,524, controls Light modulating device 26 in the mode that reduces the illumination light quantity.

On the other hand, when at image processing part 21 input rgb signals, rgb signal is transformed to HSV space or Yuv space as the color space.After 21 pairs of image processing parts transform to the image processing that the picture signal (HSV space or Yuv space) of color space stipulates, carry out the inverse transformation of color space, turn back to rgb signal.By the rgb signal of image processing part 21 inverse transformations, be input in the light valve driver 22 that each coloured light uses.Light valve driver 22 is controlled the light valve 23 that each coloured light is used according to the rgb signal of inverse transformation.

Secondly, be described in detail in the image processing of carrying out in the image processing part 21 of first kind of execution mode with reference to Fig. 3.

Fig. 3 is the block diagram of expression with the structure of the image processing part 21 of image signal transformation when the HSV space.

As shown in Figure 3, image processing part 21 comprises extension 31, image signal transformation portion 32, colourity correction portion 33, colorimetric prediction portion 34 and colour information transformation component 35.

The extension process of picture signal is carried out according to the spreading coefficient that provides from graphical analysis portion 24 in extension (expanding element) 31.

Image signal transformation portion (image signal transformation unit) 32 transforms to HSV space as the color space with the rgb signal after the expansion.This HSV space is color space shown in Figure 4, H (Hue) signal indication form and aspect (tone), S (Saturation) signal indication colourity (vividness), the brightness of V (Value) signal indication.

Memory/sensor part (detecting unit) 201 is set at the exiting side of light valve 23.Memory/sensor part 201 detects the leakage light quantity from light valve 23, and writes down the leakage light quantity that this detects.The what is called is here leaked light quantity, be that the instruction picture signal is the brightness on 0 o'clock the screen, more particularly, though be meant with Light modulating device and will cut off from the light quantity of light source 510, make each liquid crystal light valve 522,523,524 all be in to show slinkingly and show state, light still leaks into the light quantity on the screen.

This leaks light quantity, and the measured value in the time of can be with the inspection before dispatching from the factory is stored as default value.In addition, measure in the time of also can or starting when the power connection of projection type image display apparatus, store.

Whether the user utilizes control desk portion (selected cell) 202 to select the correction of colourity to be risen or drops to corrected parameter with the colourity of colorimetric prediction portion 34 predictions etc.

Colorimetric prediction portion (predicting unit) 34, according to spreading coefficient that provides from graphical analysis portion 24 and the leakage light quantity that provides from memory/sensor part 201, the colourity of prediction image projected signal.

Colourity correction portion (amending unit) 33 according to the colorimetric prediction value of colorimetric prediction portion 34 predictions, in the HSV space, is carried out the colourity correction of vividness signal (S signal).

Colour information transformation component (colour information converter unit) 35 carries out the inverse transformation of HSV space to rgb signal.

Secondly, the correcting process for the image processing part 21 when the HSV spatial alternation describes with concrete numerical value.Here, as an example, (B)=(10,50,20), the light leakage rate is 10, spreading coefficient is that 2 o'clock colourity correction describes for R, G for picture signal.

At first, when the image signal transformation when common during, become (1) formula to the HSV space.Here, colorimetric prediction portion 34 will add that image signal transformation when leaking light quantity 10 to the HSV space, predicts colourity.Here, colourity is predicted to be 170 as shown in Equation (2).

(1) primary signal

(R, G, B)=(10,50,20) at this moment, (H, S, V)=(135,204,50)

(2) consider after the leakage light quantity

(R, G, B)=(20,60,30) at this moment, (H, S, V)=(135,170,60)

Secondly, colorimetric prediction portion 34, the colourity of the picture signal when the prediction spreading coefficient is 2 times of expansions.Picture signal before the expansion can be used formula (3) expression, becomes the same with above-mentioned (1) formula.

(3) primary signal

(R, G, B)=(10,50,20) at this moment, (H, S, V)=(135,204,50)

Secondly, when with 2 times of picture signal expansions, the prediction of the colourity after expanding 2 times is represented by formula (4).

(4) 2 times of expansions

(R, G, B)=(20,100,40) at this moment, (H, S, V)=(135,204,100)

When the image signal transformation when the picture signal after 2 times of expansions in (4) formula adds leakage light quantity 10 is predicted colourity to the HSV space, become (5) formula.

(5) consider leak light quantity after

(R, G, B)=(30,110,50) at this moment, (H, S, V)=(135,185,110)

Secondly, owing to carried out 2 times of expansions, so, when during with the picture signal light modulation 1/2 of formula (5), becoming (6) formula as light modulation (dim light).

(6) light modulation (1/2)

(R, G, B)=(15,55,25) at this moment, (H, S, V)=(135,185,55)

Here, the colourity during 2 times of expansions as shown in Equation (6), is predicted as 185.Colourity correction portion 33 according to the value of the colourity of predicting with colorimetric prediction portion 34 (being 170,185), is carried out the colourity correction here.

Secondly, the colourity correction that utilizes colourity correction portion 33 to carry out is described.The colourity correction is the colourity that the colourity of color space is dropped to prediction when not expanding, and perhaps, rises to the method for the colourity of prediction during expansion.

At first, to describing by colourity being dropped to the situation that 170 adjustment revises.

In above-mentioned (4) formula, when S '=185, picture signal is as follows.

(H, S ', V)=(135,185,100) at this moment, (R, G, B)=(27,100,45)

When this (R, G add on B)=(27,100,45) and leak light quantity 10, when carrying out 1/2 light modulation,

(5 ') considered and leaks after the light quantity

(R, G, B)=(37,110,55) at this moment, (H, S, V)=(135,170,110)

(6 ') light modulation (1/2)

(R, G, B)=(18,55,28) at this moment, (H, S, V)=(135,170,55)

Shown in (6 '), become and carry out colourity dropped to 170 adjustment.

Secondly, the situation when colourity being risen to 185 adjustment and revise is described.

In above-mentioned (1) formula, when S '=204 * 185/170=223, picture signal is shown in (1 ') formula.

(1 ') primary signal

(H, S ', V)=(135,223,50) at this moment, (R, G, B)=(6,50,17)

When this (R, G add on B)=(6,50,17) and leak light quantity 10, when carrying out 1/2 light modulation,

(2 ') considered and leaks after the light quantity, become

(R, G, B)=(16,60,27) at this moment, (H, S, V)=(135,185,60)

Shown in (2 '), become and carry out colourity risen to 185 adjustment.

Like this, image signal transformation is being revised under the situation of colourity to the HSV space, the calculating of colourity correction is very simple, can will handle high speed.

Fig. 5 is the block diagram of variation of the image processing part 21 of presentation graphs 3.In addition, pay identical label, suitably omit its explanation for the structure division identical with Fig. 3.

In the handling part 21 of Fig. 5, the extension process of utilizing extension 31 to carry out is only to utilizing the V signal after 32 conversion of image signal transformation portion to carry out.

Like this, because to carrying out extension process as the V signal that transforms to the monochrome information behind the color space, so, can dwindle circuit structure, can make the processing high speed.Fig. 6 is the block diagram of expression with the structure of the image processing part 21 of image signal transformation when the Yuv space.In addition, the structure division identical with Fig. 3 paid identical label, suitably omits its explanation.

As shown in Figure 6, image processing part 21 comprises extension 31, image signal transformation portion 320, u signal correction portion 330, v signal correction portion 331, colorimetric prediction portion 34 and colour information transformation component 350.

Image signal transformation portion 320 transforms to the Yuv space of color space with the rgb signal after the expansion.Conversion to this Yuv space is carried out according to the transformation for mula shown in the mathematical formulae group A described below.In the Yuv space, Y-signal is brightness, and u signal and v signal are colourity, can represent colourity (vividness) with them.

[mathematical formulae group A]

$\left(\begin{array}{c}Y\\ u\\ v\end{array}\right)=\left(\begin{array}{ccc}0.299& 0.587& 0.114\\ -0.147& -0.289& 0.436\\ 0.615& -0.515& -0.100\end{array}\right)\left(\begin{array}{c}r\\ g\\ b\end{array}\right)$

$\left(\begin{array}{c}r\\ g\\ b\end{array}\right)=\left(\begin{array}{ccc}1& 0& 1.14\\ 1& -0.394& -0.581\\ 1& 2.03& 0\end{array}\right)\left(\begin{array}{c}Y\\ u\\ v\end{array}\right)$

H＝tan ^-1(v/u)

$S=\sqrt{u^2+v^2}/Y$

Colorimetric prediction portion 34, according to spreading coefficient that provides from graphical analysis portion 24 and the leakage light quantity that provides by memory/transducer 201, the colourity of prediction image projected signal.

U signal correction portion 330 carries out the colourity correction as the u signal of vividness signal according to the colorimetric prediction value of colorimetric prediction portion 34 predictions.Similarly, v signal correction portion 331 carries out the colourity correction as the v signal of vividness signal according to the colorimetric prediction value of colorimetric prediction portion 34 predictions.

Colour information transformation component 350 carries out the Yuv space is turned back to the inverse transformation of rgb signal.

Secondly, with concrete numerical value, the correcting process of the image processing part 21 when transforming to the Yuv space describes.Here, as an example, (B)=(10,50,20), the leakage light quantity is that 10 o'clock u signal correction, v signal correction describes for R, G to picture signal.

At first, when during to the Yuv space, becoming shown in (7) formula according to [mathematical formulae group A] image signal transformation when common.Here, the picture signal under will adding the situation of leaking light quantity 10 also when transforming to the Yuv space, becomes shown in (8) formula according to [mathematical formulae group A].

(7) primary signal

(R, G, B)=(10,50,20) at this moment, (Y, u, v)=(35 ,-7.2 ,-22)

(8) consider leak light quantity after

(R, G, B)=(20,60,30) at this moment, (Y, u, v)=(45 ,-7.2 ,-22)

Under the situation in Yuv space, shown in [mathematical formulae group A], colourity is used

(u ²+v ²) ^1/2/Y

Expression.Thus, colorimetric prediction portion 34, the colorimetric prediction when considering the leakage light quantity is S ₍₂₎=0.510.

2 times of expansions of picture signal when secondly, colorimetric prediction portion 34 is to(for) spreading coefficient is carried out colorimetric prediction.Picture signal before the expansion can be represented with (9) formula, becomes the same with above-mentioned (7).

(9) primary signal

(R, G, B)=(10,50,20) at this moment, (Y, u, v)=(35 ,-7.2 ,-22)

Secondly, when picture signal was carried out 2 times of expansions, the colorimetric prediction after 2 times of expansions became shown in (10).

(10) 2 times of expansions

(R, G, B)=(20,100,40) at this moment, (Y, u, v)=(69 ,-14 ,-43)

When adding on the picture signal after 2 times of expansions in (10) formula that image signal transformation when leaking light quantity 10 is to the Yuv space, represent shown in (11) formula.

(11) consider after the leakage light quantity

(R, G, B)=(30,110,50) at this moment, (Y, u, v)=(79 ,-14 ,-43)

(12) light modulation (1/2)

(R, G, B)=(15,55,25) at this moment, (Y, u, v)=(40 ,-7.2 ,-22)

Secondly, owing to carried out 2 times of expansions, when when the picture signal of (11) formula is carried out 1/2 light modulation, becoming shown in (12) formula as light modulation (dim light).

As mentioned above, under the situation in Yuv space, because colourity (u ²+ v ²) ^1/2/ Y represents, so the colorimetric prediction when colorimetric prediction portion 34 expands 2 times is S ₍₁₂₎=0.575.

Secondly, the colourity correction that utilizes u signal correction portion 330, v signal correction portion 331 to carry out is described.The colourity correction is the colourity that the colourity of color space is dropped to prediction when not expanding, and perhaps rises to the method for the colourity of prediction when expansion.

At first, to by colourity is dropped to S ₍₂₎Situation when=0.510 adjustment is revised describes.

In above-mentioned (10) formula, when u '=-14 * 40/-13, v '=-43 * 40/45=-38, picture signal becomes following mode.

(Y, u ', v ')=(69 ,-13 ,-38) at this moment, (R, G, B)=(26,97,43)

When (R, G add on B)=(26,97,43) when leaking light quantity 10,1/2 light modulations, become at this

After (11 ') consider and leak light quantity

(R, G, B)=(36,107,53) at this moment, (Y, u, v)=(79 ,-13 ,-38)

(12 ') light modulation (1/2)

(R, G, B)=(18,54,45) at this moment, (Y, u, v)=(40 ,-6.4 ,-19)

U=-6.4 in season, v=-19 is with (u ²+ v ²) ^1/2When/Y obtains colourity, become S ₍₁₂₎=0.510.Thus, carry out colourity dropped to 0.510 adjustment.

Secondly, to by colourity is risen to S ₍₁₂₎The situation that=0.575 adjustment is revised describes.

In above-mentioned (7) formula, u in season ₁=-7 * 45/40, v ₁=-22 * 45/40 o'clock, picture signal became as shown below.

(Y, u ₁, v ₁)=(35 ,-8.1 ,-24) at this moment, (R, G, B)=(7,52,18)

When (R, G add on B)=(7,52,18) and leak light quantity 10, when carrying out 1/2 light modulation, become at this

(8 ') considers the leakage light quantity

(R, G, B)=(17,62,28) at this moment, (Y, u, v)=(45 ,-8.1 ,-24)

U=-8.1, v=-24 use (u in season ²+ v ²) ^1/2When/Y obtains colourity, become S _{(8 ')}=0.575.Thus, carry out colourity risen to 0.575 adjustment.

Like this with picture signal to the Yuv spatial alternation, revise under the situation of colourity owing to utilize regulation formula (ranks),, can make the processing high speed so conversion is easy to the Yuv spatial alternation.

Fig. 7 is the block diagram of variation of the image processing part 21 of presentation graphs 6.In addition, for paying identical label, suitably omit its explanation with the same structure division of Fig. 6.

In the image processing part 21 of Fig. 7, the extension process of utilizing extension 31 to carry out is only carried out the Y-signal that utilizes the Yuv space after 320 conversion of image signal transformation portion.Like this, owing to only the Y-signal as monochrome information is realized extension process,, make the processing high speed so can dwindle circuit structure.

Secondly, second kind of execution mode described.In addition, for first kind of structure division that execution mode is identical, pay identical label, suitably omit its explanation.

Fig. 8 is the block diagram of structure of drive circuit of the projection type image display apparatus of second kind of execution mode of expression.

The drive circuit of second kind of execution mode provides spreading coefficient and offset (compensation rate) from graphical analysis portion 24 to image processing part 21.So-called offset (deviant) for example, is meant the darkest value in the view data, handles by way of compensation, by deduct the computing of offset with respect to picture signal, suppresses unwanted black floating (black floating) in the picture signal.

Fig. 9 is the block diagram of expression with the structure of the image processing part 21 of the second kind execution mode of image signal transformation when the HSV space.In addition,, pay identical label, suitably omit its explanation for the structure division same with the image processing part of Fig. 3.

As shown in Figure 9, image processing part 21 comprises compensation deals portion 36, extension 31, and image signal transformation portion 32, colourity correction portion 33, colorimetric prediction portion 34 and colour information transformation component 35 append compensation deals portion 36 in the front of the extension 31 of Fig. 3.

Compensation deals portion 36, the offset according to providing from graphical analysis portion 24 compensates processing to picture signal, promptly deducts the subtrahend (offset) of regulation from picture signal.

Picture signal after the 31 pairs of compensation deals in extension is carried out extension process.

Colorimetric prediction portion 34, according to the spreading coefficient that provides from graphical analysis portion 24, offset, from the leakage light quantity that memory/sensor part 201 provides, the colourity of prediction image projected signal.

Secondly, the correcting process with the image processing part 21 of the second kind execution mode of concrete numerical value when transforming to the HSV space describes.Here, as an example, be that (B)=(10,50,20), leaking light quantity is 10 for R, G, and offset is that 5 o'clock colourity correction describes for picture signal.

At first, when the image signal transformation when common during, become as shown in Equation (13) to the HSV space.Here, the image signal transformation when colorimetric prediction portion 34 will add leakage light quantity 10 is predicted colourity in the HSV space.Here, as shown in Equation (14), colorimetric prediction is 170.

(1) primary signal

(R, G, B)=(10,50,20) at this moment, (H, S, V)=(135,204,50)

(2) consider leak light quantity after

(R, G, B)=(20,60,30) at this moment, (H, S, V)=(135,175,60)

Secondly, colorimetric prediction portion 34, the colourity of the picture signal when the prediction spreading coefficient is 2 times expansion.Picture signal before the expansion can be used formula (15) expression, and is the same with above-mentioned (13) formula.

(13) primary signal

(R, G, B)=(10,50,20) at this moment, (H, S, V)=(135,204,50)

(R, G B)=(10,50,20) deduct offset 5, become as shown in Equation (14) from this.

(14) compensation

(R, G, B)=(5,45,15) at this moment, (H, S, V)=(135,227,45)

When should (B)=(5,45,15) expansion adds and leaks light quantity 10, when carrying out 1/2 light modulation, becomes for R, G

(15) 2 times of expansions

(R, G, B)=(10,90,30) at this moment, (H, S, V)=(135,227,90)

(16) consider leak light quantity after

(R, G, B)=(20,100,40) at this moment, (H, S, V)=(135,204,100)

(17) light modulation (1/2)

(R, G, B)=(10,50,20) at this moment, (H, S, V)=(135,204,50)

Shown in 17 formulas, prediction colourity is 204.

Secondly, describe for compensating the colourity correction of being undertaken by colourity correction portion 33 when handling.The colourity correction is the colourity with the color space, drops to the colourity of prediction when not expanding, and perhaps rises to the method for the colourity of prediction when expansion.

At first, to describing by colourity being dropped to 170 situations when revising.

In above-mentioned (17) formula, during S '=170 * 227/204=189, picture signal becomes as follows in season.

(H, S ', V)=(135,189,90) at this moment, (R, G, B)=(23,90,40)

When (R, G add on B)=(23,90,40) and leak light quantity 10, when carrying out 1/2 light modulation, become at this

After (18 ') consider and leak light quantity

(R, G, B)=(33,100,50) at this moment, (H, S, V)=(135,170,100)

(19 ') light modulation (1/2)

(R, G, B)=(17,50,25) at this moment, (H, S, V)=(135,170,50)

Shown in (19 ') formula, carry out colourity dropped to 170 adjustment.

Secondly, the situation when colourity being risen to the correction that 204 adjustment carries out is described.

In above-mentioned (13) formula, when S '=204 * 204/170=245, picture signal became shown in (13 ').

(13 ') primary signal

(H, S ', V)=(135,245,50) at this moment, (R, G, B)=(2,50,14)

When (R, G B)=(2,50,14) add and leak light quantity 10, when carrying out 1/2 light modulation, become at this

After (14 ') consider and leak light quantity

(R, G, B)=(12,60,24) at this moment, (H, S, V)=(135,204,60)

Shown in (14 ') formula, carry out colourity risen to 204 adjustment.

By this processing, image signal transformation was being compensated processing before the HSV space, can suppress to revise colourity under the black floating situation.

Figure 10 is the block diagram of variation of the image processing part 21 of presentation graphs 9.In addition,, pay identical label, suitably omit its explanation for the structure division identical with Fig. 9.

In the image processing part 21 of the variation of second kind of execution mode, compensation deals of being undertaken by compensation deals portion 36 and the expansion of being undertaken by extension 31 are only to carrying out as the V signal by the monochrome information after 32 conversion of image signal transformation portion.

Like this, handle and extension process owing to only the V signal as luminance signal is compensated, so, can dwindle circuit structure, make the processing high speed.

In addition, in the image processing part 21 of Fig. 9 or Figure 10, adopt the structure that is equipped with extension 31 in the back of compensation deals portion 36, but be not limited thereto.For example, also can employing be the structure of 3 ones 6 of extensions 31, compensation deals in proper order, compensate processing to the RGB picture signal after the extension process or as the V signal of monochrome information.

Figure 11 is the block diagram of expression with the structure of the image processing part 21 of the second kind execution mode of image signal transformation when the Yuv space.In addition, for paying identical label with the part of spline structure, suitably omit its explanation with Fig. 6, Fig. 9.

As shown in figure 11, image processing part 21 comprises: compensation deals portion 36, extension 31, image signal transformation portion 320, u signal correction portion 330, v signal correction portion 331, colorimetric prediction portion 34 and colour information transformation component 350 appended compensation deals portion 36 before the extension 31 of Fig. 6.

Secondly, the correcting process of the image processing part 21 of second kind of execution mode when transforming to the Yuv space describes with concrete numerical value.Here, as an example, (B)=(10,50,20), the light leakage rate is 10, offset is that 5 o'clock colourity correction describes for R, G for picture signal.

At first, when common picture signal, is become shown in the formula (20) when transforming to the Yuv space according to [mathematical formulae group A].Here, the picture signal adding situation following time of leaking light quantity 10 when transforming to the Yuv space, becomes formula (21) according to [mathematical formulae group A].

(20) primary signal

(R, G, B)=(10,50,20) at this moment, (Y, u, v)=(35 ,-7.2 ,-22)

(21) consider leak light quantity after

(R, G, B)=(20,60,30) at this moment, (Y, u, v)=(45 ,-7.2 ,-22)

Under the situation in Yuv space, because colourity is shown in [mathematical formulae group A], with (u ²+ v ²) ^1/2/ Y represents, so colorimetric prediction portion 34 will consider that the colorimetric prediction under the situation of leaking light quantity is S ₍₂₁₎=0.510.

The colourity of the picture signal when secondly, colorimetric prediction portion 34 prediction spreading coefficients are 2 times expansion.Picture signal before the expansion can be represented with (22) formula, and is the same with above-mentioned (20) formula.

(22) primary signal

(R, G, B)=(10,50,20) at this moment, (Y, u, v)=(35 ,-7.2 ,-22)

When (R, G B)=(10,50,20) when deducting offset 5, become shown in (23) formula such from this.

(23) compensation

(R, G, B)=(5,45,15) at this moment, (Y, u, v)=(29 ,-7.2 ,-22)

When should (R, G B)=(5,45,15) expand, add to leak light quantity 10, when carrying out 1/2 light modulation,

(24) 2 times of expansions

(R, G, B)=(10,90,30) at this moment, (Y, u, v)=(59 ,-14 ,-43)

(25) consider leak light quantity after

(R, G, B)=(20,100,40) at this moment, (Y, u, v)=(69 ,-14 ,-43)

(26) light modulation (1/2)

(R, G, B)=(10,50,20) at this moment, (Y, u, v)=(35 ,-7.2 ,-22)

As mentioned above, under the situation in Yuv space, because colourity is by (u ²+ v ²) ^1/2/ Y represents, so, colorimetric prediction portion 34, the colourity S when predicting 2 times of expansions ₍₂₆₎=0.658.

Secondly, under situation about compensating, utilize u signal correction portion 330, the colourity correction that v signal correction portion 331 carries out describes.The colourity correction is the colourity that the colourity of color space is dropped to prediction when not expanding, and perhaps, rises to the method for the colourity of prediction when expansion.

At first, to by colourity is dropped to S ₍₂₁₎Situation when=0.510 adjustment is revised describes.

In above-mentioned (24) formula, when u '=-14 * 35/45=-11, v '=43 * 35/45=-34, below picture signal becomes shown in.

(Y, u ', v ')=(59 ,-11 ,-34) at this moment, (R, G, B)=(21,83,36)

When (R, G B)=(21,83,36) add and leak light quantity 10, when carrying out 1/2 light modulation, become at this

(25 ') considered and leaks after the light quantity

(R, G, B)=(31,93,46) at this moment, (Y, u, v)=(69 ,-11 ,-34)

(26 ') light modulation (1/2)

(R, G, B)=(16,47,23) at this moment, (Y, u, v)=(35-5.6 ,-17)

U=-5.6 in season, v=-17 is with (u ²+ v ²) ^1/2When/Y obtains colourity, become S _{(26 ')}=0.510.Thus, carry out colourity dropped to 0.510 adjustment.

Secondly, to by colourity is risen to S ₍₂₆₎Situation when=0.658 adjustment is revised describes.

When making u '=-7 * 45/35=-9.3, v '=-22 * 45/35=-54 in (20) formula that rising, picture signal becomes as follows.

(20 ') primary signal

(Y, u ', v ')=(35 ,-9.3 ,-28) at this moment, (R, G, B)=(3,54,16)

After light quantity is leaked in (21 ') consideration

(R, G, B)=(13,64,26) at this moment, (Y, u, v)=(45 ,-9.3 ,-28)

U=-9.3, v=-28 use (u in season ²+ v ²) ^1/2When/Y obtains colourity, become S _{(21 ')}=0.658.Thus, become and carry out colourity risen to 0.658 adjustment.

By this processing, image signal transformation was being compensated processing before the Yuv space, can suppress to revise colourity under the black floating situation.

Figure 12 is the block diagram of variation of the image processing part 21 of expression Figure 11.In addition,, pay identical label, suitably omit its explanation with the part of Figure 11 same structure.

In the image processing part 21 of the variation of second kind of execution mode, adopt compensation deals of being undertaken by compensation deals portion 36 and the expansion of being undertaken by extension 31, only structure to being undertaken by the Y-signal after 32 conversion of image signal transformation portion as monochrome information.

Like this, handle and extension process owing to only the Y-signal as monochrome information is compensated, so, can dwindle circuit structure, make the processing high speed.

In addition, in the image processing part 21 of Figure 11 or Figure 12, adopt the structure that is equipped with extension 31 in the back of compensation deals portion 36, but be not limited thereto.For example, can employing be the structure of extension 31, compensation deals 36 in proper order also, compensate processing to the rgb signal after the extension process or as the Y-signal of monochrome information.

Secondly, image processing part 21 computing formula according to the rules directly being calculated colored situation about revising describes.

Figure 13 is the block diagram of structure of the image processing part 21 of the third execution mode of expression.Image processing part 21 comprises the operational part 370,371,372 of the colour correction of carrying out R signal, G signal, B signal.

The image processing part 21 of the third execution mode, the color space transformation of the picture signal as first kind or second kind of execution mode is not undertaken by utilizing operational part 370,371,372 directly to calculate RGB colour correction of all kinds.

Here, the computing formula that the operational part 370,371,372 of the image processing part 21 that utilizes the third execution mode is carried out describes.As an example, be that δ v, offset (compensation rate) situation during for v0 describes to leaking light quantity.

Under normal conditions, order is (R as the picture signal of the information on the screen ₀, G ₀, B ₀)=(r ₀+ δ v, g ₀+ δ v, b ₀+ δ v).Display image after the 1/p light modulation (p doubly expands) can be expressed as follows.

(R ₁，G ₁，B ₁)

＝(r ₁-v ₀+δv/p，g ₁-v ₀+δv/p，b ₁-v ₀+δv/p)

Here, under the situation of the correction computing that reduces vividness, operational part 370,371,372 control r ₁', g ₁', b ₁', make it to expand in the following manner

(R ₁’：G ₁’：B ₁’)

＝(r ₁’-v ₀+δv/p：g ₁’-v ₀+δv/p：b ₁’-v ₀+δv/p)

＝(R ₀：G ₀：B ₀)

＝(r ₀+δv：g ₀+δv：b ₀+δv)

In addition, under the situation of the correction computing that improves vividness, operational part 370,371,372 is similarly controlled r ₀', g ₀', b ₀', make

(R ₁’：G ₁’：B ₁’)

＝(r ₁’-v ₀+δv/p：g ₁’-v ₀+δv/p：b ₁’-v ₀+δv/p)

＝(R ₀’：G ₀’：B ₀’)

＝(r ₀’+δv：g ₀’+δv：b ₀’+δv)

Like this, because the image processing part 21 of the third execution mode does not arrive the color space with the RGB image signal transformation, carry out colour correction by direct calculating of computing formula according to the rules, so, can make the processing high speed, the amount of quickening is equivalent to save the part of conversion process.

Secondly, the 4th kind of execution mode described.In addition,, pay identical label, suitably omit its explanation for first or second kind of structure division that execution mode is identical.

Figure 14 is the block diagram of structure of drive circuit of the projection type image display apparatus of the 4th kind of execution mode of expression.The drive circuit of the 4th kind of execution mode offers image processing part 21 as map table with spreading coefficient from graphical analysis portion 24.In the 4th kind of execution mode, image processing part 21, by the spreading coefficient that map table shown in Figure 15 is paid, offset value calculation and main spreading coefficient are by these calculated values and leakage light quantity prediction vividness (colourity).In addition, the transverse axis of the map table of Figure 15 is represented the picture signal imported, and the longitudinal axis is represented the picture signal after the conversion.

Figure 16 is the block diagram of structure that is illustrated in the image processing part 21 of the 4th kind of execution mode under the situation that adopts map table.

As shown in figure 16, image processing part 21 comprises the conversion process portion 380,381,382 that carries out conversion and expansion according to map table, revises operational part 3701,3711,3721, coefficient separated part 39.

Conversion process portion 380 is according to the map table (LUT that provides from graphical analysis portion 24; Look-uptable, look-up table), the R signal of picture signal is compensated processing and extension process.Equally, the G signal of 381 pairs of picture signals of conversion process portion compensates and handles and extension process.In addition, conversion process portion 382 compensates processing and extension process to the B signal.

Spreading coefficient and offset are provided from the map table that is provided by graphical analysis portion 24 coefficient separated part 39, offer each correction operational part 3701,3711,3721 of rgb signal.

Revise operational part 3701, according to offset that provides from conversion process portion 380 and spreading coefficient, spreading coefficient and offset by coefficient separated part 39 provides from the leakage light quantity that memory/sensor part 201 provides, carry out the colourity correction of R signal.By revising the colourity correction that operational part 3701 carries out, carry out according to the computing formula of the regulation that illustrates in the third execution mode.Similarly, revise operational part 3711 and carry out the colourity correction of G signal, revise operational part 3721 and carry out the colourity correction of B signal.

Figure 17 is the block diagram of structure of the image processing part 21 of the four kind execution mode of expression when transforming to the HSV space.In addition, pay identical label, suitably omit its explanation with first, second or the third identical structure division of execution mode.

As shown in figure 17, image processing part 21 comprises: according to the conversion process portion 37 that map table carries out conversion and expansion, and image signal transformation portion 32, colourity correction portion 33, colorimetric prediction portion 34, colour information transformation component 35 and coefficient separated part 39.

Conversion process portion 37 according to the map table that provides from graphical analysis portion 24, carries out extension process and compensation deals to the picture signal of input.

Image signal transformation portion 21 will carry out the HSV space of the image signal transformation of extension process and compensation deals to the color space by conversion process portion 37.

Coefficient separated part 39, spreading coefficient and the offset that will separate from the map table that is provided by graphical analysis portion 24 offer colorimetric prediction portion 34.

Colorimetric prediction portion 34 from the leakage light quantity that memory/sensor part 201 provides, predicts the colourity of image projected signal according to the spreading coefficient, the offset that are provided by coefficient separated part 39.

Figure 18 is the block diagram of variation of the image processing part 21 of expression Figure 17.In addition,, pay identical label, suitably omit its explanation for the structure division identical with Figure 17.

In the image processing 21 of the variation of the 4th kind of execution mode, the compensation deals and the extension process of being undertaken by conversion process portion 37 according to map table are only to being undertaken by the V signal as monochrome information after 32 conversion of image signal transformation portion.

Like this, handle and extension process owing to only the V signal as monochrome information is compensated according to map table, so, can dwindle circuit structure, make the processing high speed.

In addition, in the image processing part 21 of Figure 16 to Figure 18,, can carry out complicated extension process, performance width that can the broadening image by utilizing map table.

The block diagram of structure of the drive circuit when Figure 19 is the picture signal of expression input coding.In addition, for paying identical label, suitably omit its explanation with the part of the drive circuit same structure of Fig. 2.

The drive circuit of Figure 19 further comprises encoded image signal decoders for decoding 27 on the drive circuit of Fig. 2.Decoder 27 is with encoded signals decoding, and the picture signal after will deciphering offers image processing part 21.

In addition, the image processing part 21 of Figure 19 can adopt the structure that illustrates in the variation of first to fourth kind of execution mode and each execution mode.

Figure 20 is the figure of variation of the drive circuit of expression Figure 19.In addition, the structure division identical with Figure 19 paid identical label, suitably omits its explanation.

In the drive circuit of Figure 20, decoder 27 is deciphered the picture signal of image processing of carrying out regulation with image processing part 21,, the picture signal of decoding is input to image processing part 21 that is.In addition, the same with Figure 19, the image processing part 21 of Figure 20 can adopt the structure that illustrates in the variation of first to fourth kind of execution mode and each execution mode.

Above, one embodiment of the present invention are illustrated, but the present invention is not limited to above-mentioned execution mode.

For example, select as the parameter of revising, utilize control desk portion 202 that the parameter of correction is set for the user, the situation that can select to reduce colourity or improve colourity is illustrated, but is not limited thereto.For example, in expansion platform 202, the user can set arbitrarily, makes colourity in the centre with the value of colorimetric prediction portion 34 predictions.

For example, in the present embodiment, as utilizing method for displaying image of the present invention and recording the image display device of recording medium of the embodied on computer readable of image display program, utilize projection type image display apparatus to be illustrated, but being not limited thereto, for example also can be the direct viewing type display unit.

In addition, method for displaying image of the present invention and record the recording medium of the embodied on computer readable of image display program also can be used for LCD, and electroluminescent shows, Plasma Display, and digital mirror device, the picture signal of feds etc. is handled.

Industrial utilizability

According to the present invention and since the image signal transformation of a plurality of Essential colour that will expand become to comprise colourity with The colour information of brightness after colourity revised, changes the colour information inversion into a plurality of Essential colour Picture signal, so having can be before the ratio of the picture signal that does not change a plurality of Essential colour Put the effect that change shows the dynamic range of image.

Claims (22)

1, a kind of image display device carries out the adjustment of display image by light quantity is changed, and comprising:

The expanding element that the picture signal of a plurality of Essential colour of display image is expanded;

To utilize above-mentioned expanding element image expanding signal transformation to become to comprise the image signal transformation unit of the colour information of colourity and brightness;

Carry out the amending unit of correction of the colourity of above-mentioned colour information; And

The colour information that will comprise the colourity of utilizing above-mentioned amending unit correction is transformed into the colour information converter unit of the picture signal of a plurality of Essential colour.

2, a kind of image display device carries out the adjustment of display image by light quantity is changed, and comprising:

The image signal transformation of a plurality of Essential colour of display image is become to comprise the image signal transformation unit of the colour information of colourity and brightness;

Carry out the amending unit of the colourity correction of above-mentioned colour information;

The expanding element that the brightness that utilizes the colour information after the unit conversion of above-mentioned image signal transformation is expanded; And

The colour information that will comprise the brightness that utilizes the expansion of above-mentioned expanding element and above-mentioned corrected colourity is transformed into the colour information converter unit of the picture signal of a plurality of Essential colour.

3, a kind of image display device carries out the adjustment of display image by light quantity is changed, and comprising:

The picture signal of a plurality of Essential colour of display image is compensated the compensation deals unit of processing according to offset;

To utilize above-mentioned compensation deals unit to compensate the expanding element that the picture signal after the processing is expanded;

To utilize above-mentioned expanding element image expanding signal transformation to become to comprise the image signal transformation unit of the colour information of colourity and brightness;

Carry out the amending unit of the colourity correction of above-mentioned colour information; And

To comprise the colour information converter unit that the colour information of utilizing the corrected colourity of above-mentioned amending unit is transformed into the picture signal of a plurality of Essential colour.

4, a kind of image display device carries out the adjustment of display image by light quantity is changed, and comprising:

The picture signal of a plurality of Essential colour of display image is become the image signal transformation unit of the colour information that comprises colourity and brightness;

Carry out the amending unit of the colourity correction of above-mentioned colour information;

The brightness that utilizes the colour information after the unit conversion of above-mentioned image signal transformation is compensated the compensation deals unit of processing according to offset;

The expanding element that the brightness that utilizes above-mentioned compensation deals unit to compensate the colour information after the processing is expanded; And

The colour information converter unit that will comprise the brightness that utilizes the expansion of above-mentioned expanding element and be transformed into the picture signal of a plurality of Essential colour with the colour information of the colourity of above-mentioned amending unit correction.

5, a kind of image display device carries out the adjustment of display image by light quantity is changed, and comprising:

Computing formula is according to the rules carried out the amending unit of the expansion and the colourity correction of picture signal to each of the picture signal of a plurality of Essential colour of display image.

6, a kind of image display device carries out the adjustment of display image by light quantity is changed, and comprising:

Map table according to the rules is to each converter unit of expanding of the picture signal of a plurality of Essential colour of display image; And

Utilize the amending unit of correction of colourity of the picture signal of all kinds of above-mentioned converter unit conversion.

7, image display device as claimed in claim 6, wherein, above-mentioned converter unit is according to the map table of afore mentioned rules, and each of the picture signal of a plurality of Essential colour of above-mentioned display image is compensated processing.

8,, wherein, comprise that further detection shows slinkingly the detecting unit of the demonstration light quantity when showing most as any described image display device in the claim 1 to 6;

Above-mentioned amending unit is revised according to above-mentioned demonstration light quantity.

9, image display device as claimed in claim 8, wherein, above-mentioned expanding element spreading coefficient is according to the rules expanded, further comprise according in above-mentioned offset, the above-mentioned spreading coefficient at least one of them, and above-mentioned leakage light quantity is predicted the predicting unit of above-mentioned colourity;

Above-mentioned amending unit is revised according to the colourity of utilizing above-mentioned predicting unit prediction.

10, image display device as claimed in claim 9, wherein, the selected cell that one of further comprises in a plurality of colourities of selecting to utilize above-mentioned predicting unit prediction;

Above-mentioned amending unit is revised according to the colourity that chooses with above-mentioned selected cell.

11, a kind of method for displaying image carries out the adjustment of display image by light quantity is changed, and comprising:

The first step of the picture signal of a plurality of Essential colour of expansion display image;

To utilize above-mentioned first step image expanding signal transformation to become to comprise second step of the colour information of colourity and brightness;

Carry out the third step of correction of the colourity of above-mentioned colour information; And

The colour information that will include the colourity of utilizing above-mentioned third step correction is transformed into the 4th step of the picture signal of a plurality of Essential colour.

12, a kind of method for displaying image carries out the adjustment of display image by light quantity is changed, and comprising:

The image signal transformation of a plurality of Essential colour of display image is become to comprise the first step of the colour information of colourity and brightness;

Carry out second step of correction of the colourity of above-mentioned colour information;

The third step of the brightness expansion of the colour information after the above-mentioned first step conversion will be utilized; And

The colour information that will comprise the brightness that utilizes the expansion of above-mentioned third step and carry out the colourity of above-mentioned correction is transformed into the 4th step of the picture signal of a plurality of Essential colour.

13, a kind of method for displaying image carries out the adjustment of display image by light quantity is changed, and comprising:

The picture signal of a plurality of Essential colour of display image is compensated the first step of processing according to offset;

Second step that the picture signal of utilizing after the above-mentioned first step compensation deals is expanded;

To utilize the above-mentioned second step image expanding signal transformation to become to comprise the third step of the colour information of colourity and brightness;

Carry out the 4th step of the colourity correction of above-mentioned colour information; And

The colour information that will comprise the colourity of utilizing above-mentioned the 4th step correction is transformed into the 5th step of the picture signal of a plurality of Essential colour.

14, a kind of method for displaying image carries out the adjustment of display image by light quantity is changed, and comprising:

The image signal transformation of a plurality of Essential colour of display image is become to comprise the first step of the colour information of colourity and brightness;

Carry out second step of the colourity correction of above-mentioned colour information;

The brightness that utilizes the colour information after the above-mentioned first step conversion is compensated the third step of processing according to offset;

The 4th step that the brightness of the colour information after utilizing above-mentioned third step to carry out overcompensation to handle is expanded; And

To comprise with the brightness of above-mentioned the 4th step expansion and be transformed into the 5th step of the picture signal of a plurality of Essential colour with the colour information of the colourity of the above-mentioned second step correction.

15, a kind of method for displaying image carries out the adjustment of display image by light quantity is changed, and wherein, for the picture signal of a plurality of Essential colour of display image each, computing formula is according to the rules carried out the expansion of picture signal and the correction of colourity.

16, a kind of method for displaying image carries out the adjustment of display image by light quantity is changed, and comprising:

Map table according to the rules is to each first step of expanding of the picture signal of a plurality of Essential colour of display image; And

Utilize second step of colourity correction of the picture signal of all kinds of above-mentioned first step conversion.

17, a kind of recording medium of embodied on computer readable records by making light quantity change the image display program of the adjustment usefulness of carrying out display image, makes and carries out following function on the computer:

The expanded function of the picture signal of a plurality of Essential colour of expansion display image;

To utilize above-mentioned expanded function image expanding signal transformation to become to comprise the image signal transformation function of the colour information of colourity and brightness;

Carry out the debugging functions of correction of the colourity of above-mentioned colour information; And

The colour information that will comprise the colourity of utilizing above-mentioned debugging functions correction is transformed into the colour information mapping function of the picture signal of a plurality of Essential colour.

18, a kind of recording medium of embodied on computer readable records by making light quantity change the image display program of the adjustment usefulness of carrying out display image, makes and carries out following function on the computer:

The image signal transformation of a plurality of Essential colour of display image is become to comprise the image signal transformation function of the colour information of colourity and brightness;

Carry out the debugging functions of correction of the colourity of above-mentioned colour information;

The expanded function of the brightness expansion of the colour information behind the above-mentioned image signal transformation functional mapping will be utilized; And

The colour information that will comprise the brightness that utilizes the expansion of above-mentioned expanded function and carry out the colourity of above-mentioned correction is transformed into the colour information mapping function of the picture signal of a plurality of Essential colour.

19, a kind of recording medium of embodied on computer readable records by making light quantity change the image display program of the adjustment usefulness of carrying out display image, makes and carries out following function on the computer:

The picture signal of a plurality of Essential colour of display image is compensated the compensation deals function of processing according to offset;

The expanded function of the picture signal expansion after above-mentioned compensation deals function compensation is handled will be utilized;

To utilize above-mentioned expanded function image expanding signal transformation to become to comprise the image signal transformation function of the colour information of colourity and brightness;

Carry out the debugging functions of correction of the colourity of above-mentioned colour information; And

The colour information that will include the colourity of utilizing above-mentioned debugging functions correction is transformed into the colour information mapping function of the picture signal of a plurality of Essential colour.

20, a kind of recording medium of embodied on computer readable records by making light quantity change the image display program of the adjustment usefulness of carrying out display image, makes and carries out following function on the computer:

The image signal transformation of a plurality of Essential colour of display image is become to comprise the image signal transformation function of the colour information of colourity and brightness;

Carry out the debugging functions of correction of the colourity of above-mentioned colour information;

The brightness of the colour information of utilizing above-mentioned image signal transformation functional mapping is compensated the compensation deals function of processing according to offset;

To utilize above-mentioned compensation deals function to compensate the expanded function of the brightness expansion of the colour information after the processing; And

To comprise the brightness that utilizes the expansion of above-mentioned expanded function and utilize the colour information of the colourity of above-mentioned debugging functions correction to be transformed into the colour information mapping function of the picture signal of a plurality of Essential colour.

21, a kind of recording medium of embodied on computer readable records by making light quantity change the image display program of the adjustment usefulness of carrying out display image, makes and carries out following function on the computer:

For each of the picture signal of a plurality of Essential colour of display image, computing formula according to the rules, the debugging functions that carry out the expansion and the colourity correction of picture signal.

22, a kind of recording medium of embodied on computer readable records by making light quantity change the image display program of the adjustment usefulness of carrying out display image, makes and carries out following function on the computer:

Map table according to the rules is to each of the picture signal of a plurality of Essential colour of display image, the mapping function of expanding; And

The debugging functions that the colourity of the picture signal of all kinds of utilizing above-mentioned mapping function conversion is revised.

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